Guide wheel manufacturing method and guide wheel

Abstract

The invention relates to the technical field of guide wheels, and discloses a guide wheel manufacturing method and a guide wheel, the guide wheel manufacturing method comprises the following steps: bending a part of an outer ring of a first radial plate by a first preset angle, and bending a part of an outer ring of a second radial plate by a second preset angle; a first ring groove is formed in the inner ring of one axial end of the rim, and a second ring groove is formed in the inner ring of the other axial end of the rim; the first radial plate is fixedly welded to the first annular groove and the hub, and then the second radial plate is fixedly welded to the second annular groove and the hub. First pre-deformation can be manufactured by changing the bending angle of the outer ring of the radial plate, second pre-deformation can be manufactured by changing the axial depth of the first annular groove, third pre-deformation can be manufactured in the welding process according to the preset welding sequence, and the three pre-deformations are overlapped, so that after the heat treatment of the guide wheel is completed, the heat treatment efficiency of the guide wheel is improved. The end face of the hub is higher than the end face of the rim, so that the guide wheel can be subjected to a subsequent machining process.

Description

Technical Field

[0001] The invention relates to the technical field of guide wheels, and in particular to a guide wheel manufacturing method and a guide wheel. Background Art

[0002] The guide wheel is an important component of the traveling device of hydraulic engineering machinery. It is widely used in hydraulic excavators and bulldozers. It is an important unit of the traveling and supporting system of crawler engineering machinery. Among them, the wheel body of the guide wheel is divided into three structures: welded, integral forged and integral cast. The welded wheel body consists of a rim, a hub and a spoke. In the manufacturing process of the welded wheel body, due to the inevitable deformation in the welding and heat treatment processes, the superposition of the deformation of the two steps will eventually cause the hub to offset relative to the rim. The deformation problem of the welded wheel body greatly limits the reliability and durability of this type of wheel body.

[0003] At present, in the existing welding wheel manufacturing process, the deformation problem of the wheel body is mainly solved by the forced correction method. After the wheel body completes the heat treatment, the wheel rim of the wheel body is padded from the bottom by the correction equipment and pressure is applied to the hub from the top to change the relative positions of the two, thereby improving the misalignment of the hub. Although this correction method can improve the deformation of the wheel body, the weld of the wheel body will generate greater stress during the forced correction process. Even if the weld of the wheel body does not crack during the forced correction process, when the wheel body is assembled and working, the residual stress at the weld is superimposed on the working stress, and the wheel body is still prone to cracking, and the reliability and durability of the wheel body are still poor. Summary of the invention

[0004] In view of this, the present invention provides a guide wheel manufacturing method and a guide wheel to solve the problem that the deformation solution of the existing welded guide wheel has poor improvement effect.

[0005] In a first aspect, the present invention provides a guide wheel manufacturing method, wherein the guide wheel comprises a wheel rim, a wheel hub, and a first spoke plate and a second spoke plate, and the guide wheel manufacturing method comprises: Bend a portion of the outer ring of the first spoke plate to a first preset angle, and bend a portion of the outer ring of the second spoke plate to a second preset angle; A first annular groove is formed on the inner ring at one axial end of the wheel rim, and a second annular groove is formed on the inner ring at the other axial end of the wheel rim; Firstly, the first spoke plate is respectively welded and fixed to the first annular groove and the wheel hub, and then the second spoke plate is respectively welded and fixed to the second annular groove and the wheel hub.

[0006] Beneficial effects: The first pre-deformation can be produced by changing the bending angle of the outer ring of the spoke plate, the second pre-deformation can be produced by changing the axial depth of the first ring groove, and the third pre-deformation can be produced during the welding process through a predetermined welding sequence. By superimposing the three pre-deformations, the end face of the hub of the guide wheel can be higher than the end face of the rim after the heat treatment is completed, so that the guide wheel can undergo subsequent machining processes. In addition, since the total pre-deformation is formed by the three pre-deformations together, the total pre-deformation can be flexibly adjusted by adjusting any one of the pre-deformations, so as to flexibly adapt to guide wheels of various specifications and models, effectively solving the problem of poor improvement effect of the deformation solution method of the existing welded guide wheel.

[0007] In an optional embodiment, the steps of first welding and fixing the first spoke plate to the first annular groove and the wheel hub respectively, and then welding and fixing the second spoke plate to the second annular groove and the wheel hub respectively include: The first spoke plate is spot welded to the first annular groove and the wheel hub respectively, and the second spoke plate is spot welded to the second annular groove and the wheel hub respectively; the inner ring of the first spoke plate is fully welded to the wheel hub first, and then the outer ring of the first spoke plate is fully welded to the first annular groove; the outer ring of the second spoke plate is fully welded to the second annular groove first, and then the inner ring of the second spoke plate is fully welded to the wheel hub.

[0008] Beneficial effect: Using this welding step for welding can make the end face of the hub protrude beyond the end face of the rim, reduce the difference in the protrusion of the two end faces of the hub, and improve the consistency of the end faces of the hub at both ends protruding from the end faces of the rim. It can not only ensure the minimum processing allowance on the subsequent automated machining line and avoid black skin residue, but also avoid tool breakage caused by excessive processing allowance, reduce tool loss, and ensure the production efficiency of the automated machining line.

[0009] In an optional implementation, the first preset angle is less than or equal to the second preset angle.

[0010] Beneficial effect: When there is a difference between the first preset angle and the second preset angle, the pre-deformation amount can be more significantly improved.

[0011] In an optional embodiment, the depth of the first annular groove along the axial direction is a first preset depth, the depth of the second annular groove along the axial direction is a second preset depth, and the first preset depth is less than or equal to the second preset depth.

[0012] Beneficial effect: When there is a difference between the first preset depth and the second preset depth, the pre-deformation amount can be more significantly improved.

[0013] In an optional embodiment, after the steps of first welding and fixing the first spoke plate to the first annular groove and the wheel hub respectively, and then welding and fixing the second spoke plate to the second annular groove and the wheel hub respectively, the method further includes: The welded guide wheel is subjected to medium frequency induction heating by a heating device, and the guide wheel is quenched.

[0014] Beneficial effect: The medium frequency quenching step can further improve the strength and wear resistance of the welded guide wheel and improve the stress condition therein.

[0015] In an optional embodiment, the step of performing medium frequency induction heating on the welded guide wheel by a heating device and quenching the guide wheel comprises: The tread surface of the wheel rim at one end where the first spoke plate of the wheel rim of the guide wheel is located is heated by a heating device, and the guide wheel is subjected to a first cooling and quenching; The tread surface of the wheel rim at one end where the second spoke plate of the wheel rim of the guide wheel is located is heated by a heating device, and the guide wheel is cooled and quenched for the second time.

[0016] Beneficial effect: Through this quenching step, the difference in the protrusion amount of the two end faces of the hub can be further reduced on the basis of the previous one, and the consistency of the end faces at both ends of the hub protruding from the end faces of the rim can be improved.

[0017] In an optional embodiment, the hub has a through hole extending in the axial direction; The heating equipment includes an induction heater and a rotatable positioning assembly. The positioning assembly includes an axial positioning rotary tray and a radial positioning center pin. The axial positioning rotary tray has three bearing surfaces spaced 120° apart. The bearing surfaces are used to abut against the end surfaces of the wheel rim. The radial positioning center pin is arranged on the axial positioning rotary tray and is coaxially arranged with the axial positioning rotary tray. The radial positioning center pin is plug-fitted with the through hole of the wheel hub.

[0018] Beneficial effect: By using this type of heating equipment, through radial positioning of the center pin and axial positioning of the through hole, it can be ensured that the guide wheel does not have radial movement in any direction during rotation, and the radial runout of the wheel tread is stabilized. By axially positioning the bearing surface of the rotating tray and the end face positioning of the wheel rim, the possibility of shaking of the guide wheel during rotation can be further reduced, and the heating uniformity of the guide wheel during rotation can be effectively improved, ensuring the consistency and controllability of further deformation of the guide wheel after heat treatment.

[0019] In an optional embodiment, the step of performing medium frequency induction heating on the welded guide wheel by a heating device and quenching the guide wheel comprises: The tread of the wheel rim at the end where the first spoke plate of the wheel rim is located is heated to 850-900° C. by a heating device, and the heating time ranges from 145 to 465 seconds; The guide wheel is sunk into the quenching water tank for immersion spray quenching. The spraying time range is 120-140S, the spraying pressure range is 0.1-0.3MPa, the spraying flow range is 55-75m³ / h, and the final quenching hardness is ≥51HRC; The tread of the wheel rim at the end where the second spoke plate of the wheel rim is located is heated to 850-900° C. by a heating device, and the heating time ranges from 145 to 465 seconds; The guide wheel is sunk into the quenching water tank for immersion spray quenching. The spraying time range is 120-140S, the spraying pressure range is 0.1-0.3MPa, the spraying flow range is 55-75m³ / h, and the final quenching hardness is ≥51HRC.

[0020] Beneficial effects: The quenching step is simple and effective, and can effectively improve the overall structural strength of the guide wheel and the wear resistance of the wheel rim tread.

[0021] In an optional embodiment, after the step of performing medium frequency induction heating on the welded guide wheel by a heating device and quenching the guide wheel, the method further includes: The guide wheel is subjected to low temperature tempering, the tempering temperature range is 190-210°C, and the tempering time range is 1.5H-2.5H, so that the tread hardness of the guide wheel rim after tempering is controlled at 48-58HRC.

[0022] Beneficial effect: While eliminating the internal stress of the guide wheel through the tempering step, the hardness of the wheel rim can also be further adjusted to prevent cracking and improve strength and wear resistance.

[0023] In a second aspect, the present invention further provides a guide wheel, which is manufactured by the above-mentioned guide wheel manufacturing method, and includes: a rim, a hub, and a first spoke plate and a second spoke plate, wherein the hub is fixedly connected to the rim via the first spoke plate and the second spoke plate respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the main steps of a guide wheel manufacturing method according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of the steps of the guide wheel manufacturing method shown; Figure 3 for Figure 1A schematic cross-sectional view of a guide wheel in a guide wheel manufacturing method shown; Figure 4 for Figure 1 The cutaway schematic diagram shown is a guide wheel in cooperation with a heating device.

[0026] Description of reference numerals: 1. wheel rim; 101. first annular groove; 102. second annular groove; 103. first tread section; 104. protruding section; 105. second tread section; 2. hub; 201. through hole; 3. first spoke plate; 4. second spoke plate; 5. Heating equipment; 501. Induction heater; 502. Positioning assembly; 5021. Axial positioning rotary tray; 5022. Radial positioning center pin; 5023. Bearing surface. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] Combine the following Figures 1 to 4 , describing an embodiment of the present invention.

[0029] In the related art, in order to improve the deformation problem of the welded wheel body, the wheel rim and the wheel hub are usually misaligned in advance during the welding process of the wheel body to create a reverse offset, thereby offsetting the deformation problem of the wheel body after welding and heat treatment. However, in the actual production process, after the welding and heat treatment processes of the welded wheel body are completed, the two end faces of the wheel body need to be machined. At this time, the end face of the wheel hub needs to be higher than the end face of the wheel rim before machining can be performed. When the end face of the wheel hub is lower than the end face of the wheel rim, it means that the wheel body after the welding and heat treatment processes are completed is not Qualified. Although the above improvement method can offset the deformation of part of the wheel body during the welding and heat treatment processes to a certain extent, the end face of the wheel hub at one end of the wheel body under this improvement method will still be lower than the end face of the rim. For example, before improvement, the end face of one end of the wheel hub is 5mm lower than the end face of the rim, and the end face of the other end of the wheel hub is 7mm higher than the end face of the rim. After adopting the above improvement method, the end face of one end of the wheel hub can be 1mm lower than the end face of the rim, and the end face of the other end of the wheel hub can be 3mm higher than the end face of the rim. Although the deformation is reduced, the wheel body is still unqualified.

[0030] According to an embodiment of the present invention, on the one hand, a guide wheel manufacturing method is provided, the guide wheel comprising a rim 1, a hub 2, and a first spoke 3 and a second spoke 4, the guide wheel manufacturing method comprising: Bend a portion of the outer circle of the first spoke 3 to a first preset angle, and bend a portion of the outer circle of the second spoke 4 to a second preset angle; A first annular groove 101 is formed on the inner ring of one axial end of the wheel rim 1, and a second annular groove 102 is formed on the inner ring of the other axial end of the wheel rim 1; First, the first spoke plate 3 is welded and fixed to the first annular groove 101 and the wheel hub 2 respectively, and then the second spoke plate 4 is welded and fixed to the second annular groove 102 and the wheel hub 2 respectively.

[0031] By applying the guide wheel manufacturing method of the present embodiment, a first pre-deformation can be produced by changing the bending angle of the outer ring of the spoke plate, a second pre-deformation can be produced by changing the axial depth of the first annular groove 101, and a third pre-deformation can be produced during the welding process through a predetermined welding sequence. By superimposing the three pre-deformations, after the guide wheel has completed the heat treatment, the end face of the hub 2 can be higher than the end face of the rim 1, so that the guide wheel can undergo subsequent machining processes. In addition, since a total pre-deformation is formed by the three pre-deformations together, the total pre-deformation can be flexibly adjusted by adjusting any one of the pre-deformations, so as to flexibly adapt to guide wheels of various specifications and models, thereby effectively solving the problem of poor improvement effect of the deformation solution method of the existing welded guide wheel.

[0032] It should be noted that, in the steps of first welding and fixing the first spoke plate 3 to the first annular groove 101 and the wheel hub 2 respectively, and then welding and fixing the second spoke plate 4 to the second annular groove 102 and the wheel hub 2 respectively, the welding here refers to the formal welding process excluding the positioning steps such as spot welding.

[0033] That is, after the first spoke plate 3 is completely welded, the remaining welding steps are performed on the second spoke plate 4. It is not that after the first spoke plate 3 and the second spoke plate 4 are spot-welded, the first welding step is first performed on the first spoke plate 3, and the first welding step is performed on the second spoke plate 4, and then the second welding step is performed on the first spoke plate 3, and the second welding step is performed on the second spoke plate 4. The welding method of this embodiment can not only shorten the time required for the welding process, but also further improve the qualified rate of the guide wheel.

[0034] In addition, it should be noted that there is no limitation on the first preset angle, the second preset angle, the size of the first annular groove 101 and the size of the second annular groove 102. Since the guide wheels have many specifications and sizes, guide wheels of different specifications and sizes need to use angles and annular groove sizes of corresponding values.

[0035] In a possible implementation, the steps of first welding and fixing the first spoke plate 3 to the first annular groove 101 and the wheel hub 2 respectively, and then welding and fixing the second spoke plate 4 to the second annular groove 102 and the wheel hub 2 respectively include: The first spoke plate 3 is spot-welded to the first annular groove 101 and the wheel hub 2, and the second spoke plate 4 is spot-welded to the second annular groove 102 and the wheel hub 2; First, the inner ring of the first spoke plate 3 is fully welded to the hub 2, and then the outer ring of the first spoke plate 3 is fully welded to the first annular groove 101; First, the outer ring of the second spoke plate 4 is fully welded to the second annular groove 102 , and then the inner ring of the second spoke plate 4 is fully welded to the wheel hub 2 .

[0036] Specifically, during the machining of the guide wheel, the protrusion of one end face of the hub 2 is 6.5 mm, while the protrusion of the other end face of the hub 2 is 1 mm. Although both end faces of this type of guide wheel can be machined, due to the different protrusions of the hub 2, when the same tool is used to machine the two ends separately, it is more difficult to machine the end face due to the larger protrusion of one end. Not only is the machining process slower, but tool breakage is also likely to occur during the machining process, which greatly increases the labor cost and tool cost of the machining process, and also greatly reduces the production efficiency of the automated machining line.

[0037] By using the above welding steps for welding, the end face of the hub 2 can be made to protrude from the end face of the rim 1, while the difference in the protrusion of the two end faces of the hub 2 can be reduced, and the consistency of the protrusion of the end faces of the two ends of the hub 2 from the end face of the rim 1 can be improved, which can not only ensure the minimum machining allowance on the subsequent automated machining line and avoid black skin residue, but also avoid tool collapse caused by excessive machining allowance, reduce tool loss, and ensure the production efficiency of the automated machining line. For example: after using the above welding steps, the protrusion of one end face of the hub 2 becomes 5mm, and the protrusion of the other end becomes 2.5mm.

[0038] In a possible implementation manner, the first preset angle is less than or equal to the second preset angle.

[0039] When there is a difference between the first preset angle and the second preset angle, the pre-deformation amount can be more significantly increased.

[0040] Specifically, Figure 3 As shown, the angle shown in A is the first preset angle, and the angle shown in B is the second preset angle.

[0041] In a possible implementation, the depth of the first annular groove 101 along the axial direction is a first preset depth, the depth of the second annular groove 102 along the axial direction is a second preset depth, and the first preset depth is less than or equal to the second preset depth.

[0042] When there is a difference between the first preset depth and the second preset depth, the pre-deformation amount can be more significantly increased.

[0043] Specifically, Figure 3 As shown, the depth dimension shown in C is the first preset depth, and the depth dimension shown in D is the second preset depth.

[0044] Below, the guide wheel of model 190C is described in detail: In this model of guide wheel, the first preset angle range is 5 degrees to 7 degrees, preferably 6 degrees, the second preset angle range is 9 degrees to 11 degrees, preferably 10 degrees, the first preset depth range is 16.94mm to 17.14mm, preferably 17.04mm, and the second preset depth range is 19.94mm to 20.14mm, preferably 20.04mm.

[0045] The experimental data using the above welding method are detailed in Table 1 below.

[0046]

[0047] Table 1 Deformation test after specific welding steps Among them, it should be noted that NG means unqualified and OK means qualified; the holed side and the non-holed side of the guide wheel represent the two ends of the guide wheel axis respectively; when the hub 2 is the longest and the rim 1 is the shortest in the guide wheel of the 190C model, the difference in length between the hub 2 and the rim 1 is 4.8mm, and when the protrusion of one end is less than 4.8mm, the protrusions at both ends are greater than 0, that is, the end faces of the holed side and the non-holed side of the guide wheel can be machined.

[0048] It should be noted that 4.8mm does not take into account the increase in width of the rim after quenching. The actual width increases by an average of 1.1mm, with the minimum increase being 0.7mm and the maximum increase being 1.6mm. The maximum difference in length between the hub 2 and the rim 1 becomes 4.1mm.

[0049] It can be seen from the above table that by adopting the above welding step sequence, the amount of reverse deformation produced after heat treatment steps such as quenching is small, all within 1 mm; adopting the above welding step sequence can effectively ensure that the end faces of the hub 2 on the hole side and the non-hole side of the guide wheel protrude from the end face of the rim 1.

[0050] In a possible implementation, after the steps of respectively welding and fixing the first spoke plate 3 to the first annular groove 101 and the wheel hub 2, and then respectively welding and fixing the second spoke plate 4 to the second annular groove 102 and the wheel hub 2, the method further includes: The welded guide wheel is subjected to medium frequency induction heating by the heating device 5 and is quenched.

[0051] The medium frequency quenching step can further improve the strength and wear resistance of the welded guide wheel and improve the stress conditions therein.

[0052] There is no strict limitation on the steps of medium frequency quenching, and the specific steps and quenching parameters of the medium frequency quenching can be selected according to the specifications and dimensions of the guide wheel.

[0053] In a possible implementation manner, the steps of performing medium frequency induction heating on the welded guide wheel by the heating device 5 and quenching the guide wheel include: The tread surface of one end of the rim 1 of the guide wheel where the first spoke plate 3 is located is heated by the heating device 5, and the guide wheel is cooled and quenched for the first time; The tread surface of one end of the rim 1 of the guide wheel where the second web 4 is located is heated by the heating device 5, and the guide wheel is cooled and quenched for the second time.

[0054] Through this quenching step, the difference in the protrusion amount of the two end faces of the hub 2 can be further reduced on the basis of the previous one, and the consistency of the end faces at both ends of the hub 2 protruding from the end face of the rim 1 can be improved.

[0055] Specifically, after optimizing the difference in the protrusion of the hub 2 using the above-mentioned welding steps, although the chipping phenomenon during machining can be greatly reduced, since there is still a large difference in the protrusion at both ends of the hub 2, when machining both ends, the end with a larger protrusion still has a lower machining efficiency.

[0056] After adopting the above-mentioned welding, further using the above-mentioned quenching sequence can further optimize the difference in the protrusion amount at both ends of the hub 2. For example, after using the above-mentioned welding steps, the protrusion amount of one end face of the hub 2 becomes 4 mm, while the protrusion amount of the other end becomes 3.5 mm.

[0057] Below, we will still use the 190C model guide wheel for detailed description: Based on the above welding method, the experimental data of the above quenching steps are shown in Tables 2 and 3 below.

[0058]

[0059] Table 2 Deformation test of one end after specific welding steps

[0060] Table 3 Deformation test of the other end after specific welding steps It can be seen from the above table that after adopting the above welding step sequence and quenching step sequence, the difference in the protrusion amount on both sides of the hub can be reduced to within 2mm, which can effectively improve the consistency and efficiency of different end surface machining during the guide wheel machining process.

[0061] In a possible implementation, the hub 2 has a through hole 201 extending in the axial direction; The heating device 5 includes an induction heater 501 and a rotatable positioning assembly 502. The positioning assembly 502 includes an axial positioning rotary tray 5021 and a radial positioning center pin 5022. The axial positioning rotary tray 5021 has three bearing surfaces 5023 spaced 120° apart. The bearing surfaces 5023 are used to abut against the end surface of the wheel rim 1. The radial positioning center pin 5022 is arranged on the axial positioning rotary tray 5021 and is coaxially arranged with the axial positioning rotary tray 5021. The radial positioning center pin 5022 forms a positioning end at one end away from the axial positioning rotary tray 5021. The positioning end is used to be plugged into and matched with the through hole 201 of the wheel hub 2.

[0062] By using this type of heating device 5, the radial positioning of the center pin 5022 and the axial positioning of the through hole 201 can ensure that the guide wheel does not undergo radial movement in any direction during rotation, stabilize the radial runout of the wheel tread, and perform end face positioning of the bearing surface 5023 of the axially positioned rotary tray 5021 and the wheel rim 1, which can further reduce the possibility of shaking of the guide wheel during rotation, effectively improve the uniformity of heating of the guide wheel during rotation, and ensure the consistency and controllability of further deformation of the guide wheel after heat treatment.

[0063] Specifically, the induction heater 501 is an induction heater.

[0064] In one possible implementation, The steps of performing medium frequency induction heating on the welded guide wheel by the heating device 5 and quenching the guide wheel include: The tread surface of the wheel rim 1 at one end where the first web 3 is located is heated to 850-900° C. by a heating device 5, and the heating time ranges from 145 to 465 seconds; The guide wheel is sunk into the quenching water tank for immersion spray quenching. The spraying time range is 120-140S, the spraying pressure range is 0.1-0.3MPa, the spraying flow range is 55-75m³ / h, and the final quenching hardness is ≥51HRC; The tread surface of the wheel rim 1 at the end where the second spoke plate 4 is located is heated to 850-900° C. by a heating device 5, and the heating time ranges from 145 to 465 seconds; The guide wheel is sunk into the quenching water tank for immersion spray quenching. The spraying time range is 120-140S, the spraying pressure range is 0.1-0.3MPa, the spraying flow range is 55-75m³ / h, and the final quenching hardness is ≥51HRC.

[0065] The quenching step is simple and effective, and can effectively improve the overall structural strength of the guide wheel and the wear resistance of the wheel rim tread.

[0066] In a possible implementation manner, after the step of performing medium frequency induction heating on the welded guide wheel by the heating device 5 and quenching the guide wheel, the following step is further included: The guide wheel is subjected to low temperature tempering, the tempering temperature range is 190-210° C., and the tempering time range is 1.5H-2.5H, so that the tread hardness of the rim 1 of the guide wheel after tempering is controlled at 48-58HRC.

[0067] While eliminating the internal stress of the guide wheel through the tempering step, the hardness of the wheel rim 1 can also be further adjusted to prevent cracking and improve strength and wear resistance.

[0068] Specifically, the overall wheel rim 1 can be divided into three parts along the axial direction: a first tread section 103, a protruding section 104 and a second tread section 105. The first annular groove 101 is located on the inner side of the first tread section 103, and the second annular groove 102 is located on the inner side of the second tread section 105. The metallographic structure of the hardened layer after quenching is level 3-7. The depth of the hardened layer on the tread and the side of the boss of the wheel rim 1 is ≥3mm, and the depth of the hardened layer at the inner angle formed by the tread and the side of the boss is ≥1mm.

[0069] Furthermore, it should be noted that Figure 2 Only the key steps in the guide wheel manufacturing method of this embodiment are listed, and not all the steps are listed. The necessary processing steps required for the manufacturing process can also be flexibly inserted according to needs.

[0070] According to an embodiment of the present invention, on the other hand, a guide wheel is provided, which is manufactured by the above-mentioned guide wheel manufacturing method, and includes: a rim 1, a hub 2, and a first spoke plate 3 and a second spoke plate 4, and the hub 2 is fixedly connected to the rim 1 through the first spoke plate 3 and the second spoke plate 4 respectively.

[0071] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for manufacturing a guide wheel, the guide wheel comprising a rim (1), a hub (2), a first spoke plate (3) and a second spoke plate (4), characterized in that: The guide wheel manufacturing method comprises: Bend a portion of the outer ring of the first spoke (3) at a first preset angle, and bend a portion of the outer ring of the second spoke (4) at a second preset angle; A first annular groove (101) is formed on the inner ring of one axial end of the wheel rim (1), and a second annular groove (102) is formed on the inner ring of the other axial end of the wheel rim (1); First, the first spoke plate (3) is respectively welded and fixed to the first annular groove (101) and the wheel hub (2), and then the second spoke plate (4) is respectively welded and fixed to the second annular groove (102) and the wheel hub (2).

2. The guide wheel manufacturing method according to claim 1, characterized in that: The steps of firstly welding and fixing the first spoke plate (3) to the first annular groove (101) and the wheel hub (2) respectively, and then welding and fixing the second spoke plate (4) to the second annular groove (102) and the wheel hub (2) respectively include: The first spoke plate (3) is fixed to the first annular groove (101) and the wheel hub (2) by spot welding respectively, and the second spoke plate (4) is fixed to the second annular groove (102) and the wheel hub (2) by spot welding respectively; Firstly, the inner ring of the first spoke plate (3) is fully welded to the wheel hub (2), and then the outer ring of the first spoke plate (3) is fully welded to the first annular groove (101); First, the outer ring of the second spoke plate (4) and the second annular groove (102) are fully welded, and then the inner ring of the second spoke plate (4) and the wheel hub (2) are fully welded.

3. The guide wheel manufacturing method according to claim 1 or 2, characterized in that: The first preset angle is less than or equal to the second preset angle.

4. The guide wheel manufacturing method according to claim 3, characterized in that: The depth of the first annular groove (101) along the axial direction is a first preset depth, the depth of the second annular groove (102) along the axial direction is a second preset depth, and the first preset depth is less than or equal to the second preset depth.

5. The guide wheel manufacturing method according to claim 3, characterized in that: After the steps of first welding and fixing the first spoke plate (3) to the first annular groove (101) and the wheel hub (2) respectively, and then welding and fixing the second spoke plate (4) to the second annular groove (102) and the wheel hub (2) respectively, the method further comprises: The guide wheel that has been welded is subjected to medium frequency induction heating by a heating device (5), and the guide wheel is quenched.

6. The guide wheel manufacturing method according to claim 5, characterized in that: The steps of performing medium frequency induction heating on the welded guide wheel by means of a heating device (5) and quenching the guide wheel include: The rim tread of one end of the rim (1) of the guide wheel where the first web (3) is located is heated by a heating device (5), and the guide wheel is subjected to a first cooling and quenching process; The tread surface of one end of the rim (1) of the guide wheel where the second web (4) is located is heated by a heating device (5), and the guide wheel is subjected to a second cooling and quenching.

7. The guide wheel manufacturing method according to claim 5, characterized in that: The hub (2) has a through hole (201) extending in the axial direction inside; The heating device (5) comprises an induction heater (501) and a rotatable positioning assembly (502); the positioning assembly (502) comprises an axial positioning rotary tray (5021) and a radial positioning center pin (5022); the axial positioning rotary tray (5021) has three bearing surfaces (5023) spaced 120 degrees apart; the bearing surfaces (5023) are used to abut against the end surfaces of the wheel rim (1); the radial positioning center pin (5022) is arranged on the axial positioning rotary tray (5021) and is coaxially arranged with the axial positioning rotary tray (5021); the radial positioning center pin (5022) is used to be plugged into and fitted with the through hole (201) of the wheel hub (2).

8. The guide wheel manufacturing method according to claim 6, characterized in that: The steps of performing medium frequency induction heating on the welded guide wheel by means of a heating device (5) and quenching the guide wheel include: The tread surface of the rim (1) at the end where the first web (3) is located is heated to 850-900° C. by means of a heating device (5), with the heating time ranging from 145 to 465 seconds; The guide wheel is sunk into the quenching water tank for immersion spray quenching, the spraying time range is 120-140S, the spraying pressure range is 0.1-0.3MPa, the spraying flow range is 55-75m³ / h, and the final quenching hardness is ≥51HRC; The tread surface of the rim (1) at the end where the second web (4) is located is heated to 850-900° C. by means of a heating device (5), with the heating time ranging from 145 to 465 seconds; The guide wheel is sunk into the quenching water tank for immersion spray quenching, the spraying time range is 120-140S, the spraying pressure range is 0.1-0.3MPa, the spraying flow range is 55-75m³ / h, and the final quenching hardness is ≥51HRC.

9. The guide wheel manufacturing method according to claim 6, characterized in that: After the step of performing medium frequency induction heating on the welded guide wheel by the heating device (5) and quenching the guide wheel, the method further comprises: The guide wheel is subjected to low temperature tempering, the tempering temperature range is 190-210° C., and the tempering time range is 1.5 hours-2.5 hours, so that the tread hardness of the wheel rim (1) after the guide wheel is tempered is controlled to be 48-58 HRC.

10. A guide wheel manufactured by the guide wheel manufacturing method according to any one of claims 1 to 9, characterized in that: include: A wheel rim (1), a wheel hub (2), a first spoke plate (3) and a second spoke plate (4), wherein the wheel hub (2) is fixedly connected to the wheel rim (1) via the first spoke plate (3) and the second spoke plate (4), respectively.

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